14-26 11 16 - Secondary Unit Substations EB20.pdf

CONTRACT NUMBER [TBD] PRI AREA GAS DETECT & SWGR SD-1 REPL AT WRRF

NOVEMBER 2025 DETROIT, MICHIGAN

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26 11 16-1

SECTION 26 11 16

SECONDARY UNIT SUBSTATIONS

PART 1 - GENERAL

1.01 SUMMARY

A. Scope: Contractor shall provide all labor, materials, equipment, and incidentals as shown, specified, and required to demolish existing EB-20 Unit Substation and furnish and install new unit substation in its place.

B. Related Sections:

1. Section 26 05 53, Identification for Electrical Systems.

1.02 REFERENCES

A. Standards referenced in this Section are:

1. ANSI/IEEE C37.13, Definite Purpose Switching Devices for Use in Metal-Enclosed

Low-Voltage.

2. ANSI/IEEE C37.20 Series, comprised of ANSI/IEEE C37.20.1, Metal-Enclosed Low-

Voltage Power Circuit Breaker Switchgear, ANSI/IEEE C37.20.2, Metal-Clad and

Station-Type Switchgear, and ANSI/IEEE C37.20.3, Metal-Enclosed Interrupter

Switchgear, and ANSI/IEEE C37.20.4, Indoor AC Switches (1 kV-28kV) for Use in

Metal-Enclosed Interrupter Switchgear.

3. ANSI/IEEE C57.12.00, Standard General Requirements for Liquid-Immersed

Distribution, Power, and Regulating Transformers.

4. IEEE C37.16, Preferred Ratings, Related Requirements, and Application

Recommendations for Low-Voltage AC (635 V and below) and DC (3200 V and below) Power Circuit Breakers.

5. IEEE C57.12.51, Ventilated Dry-Type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Voltage 601 V to 34 500 V; Low-Voltage 208Y/120 V to 4160

V—General Requirements.

6. IEEE C57.12.90, Test Code for Liquid-Immersed Distribution, Power, and Regulating

Transformers.

7. IEEE C57.12.91, Standard Test Code for Dry-Type Distribution and Power

Transformers.

8. ISO 9002, Quality Systems -- Model for Quality Assurance in Production, Installation and Servicing.

9. UL 489, Branch Circuit Molded-Case Circuit Breakers, Molded-Case Switches and

Circuit-Breaker Enclosures.

10. UL 891, Safety Switchboards.

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11. NEMA TR 1, Transformers, Regulators and Reactors.

12. NEMA TP 1, Guide for Determining Energy Efficiency for Distribution Transformers.

13. ANSI/NETA ATS, Standard for Acceptance Testing Specifications for Electrical Power

Equipment and Systems

14. ANSI/NETA MTS, Standard for Maintenance Testing Specifications for Electrical

Power Distribution Equipment and Systems

15. UL 1066, Low Voltage Power Circuit Breakers.

1.03 QUALITY ASSURANCE

A. Qualifications:

1. Manufacturer:

a. Manufacturer shall have not less than five years experience manufacturing and servicing products substantially similar to those required for the Project and, upon request, shall submit documentation of not less than five installations in satisfactory operation for not less than five years each.

b. Manufacturer shall be ISO 9002 certified.

B. Component Supply and Compatibility:

1. Obtain all materials and equipment included in this Section regardless of component manufacturer from a single secondary unit substation manufacturer.

2. Secondary unit substation manufacturer shall review and approve or prepare all

Shop Drawings and other submittals for all components furnished under this

Section.

3. Components shall be suitable for the specified service conditions and shall be integrated into overall assembly by secondary unit substation manufacturer.

C. Regulatory Requirements: Comply with the following:

1. United States Department of Energy, 10 CFR Part 431, Energy Conservation.

1.04 SUBMITTALS

A. Action Submittals: Submit the following:

1. Shop Drawings:

a. Three-line diagrams.

b. Control schematics and elementary wiring diagrams showing numbered terminal points and interconnections to other units.

c. Construction details of enclosures with conduit entry locations and connection details between assemblies.

d. Dimensional information including front view elevation and floor plan information.

e. Components list and nameplate schedule.

f. Summary sheets with schedules of equipment.

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g. Key interlock scheme and sequence of operation.

2. Product Data:

a. Manufacturer’s technical information, including catalog information.

b. Manufacturer's technical specifications with assembly and component ratings.

c. Time current curves for protective devices.

3. Testing Plans, Procedures, and Testing Limitations:

a. Not less than thirty days prior to factory testing, submit description of proposed factory testing methods, procedures, and apparatus.

b. Not less than thirty days prior to field testing, submit description of proposed testing methods, procedures, and apparatus.

B. Informational Submittals: Submit the following:

1. Manufacturer’s Instructions:

a. Special shipping, storage and protection, and handling instructions.

b. Installation data for the equipment, including setting drawings, templates, and directions and tolerances for installing anchorage devices.

2. Source Quality Control Submittals:

a. Report of results of testing and inspections performed at manufacturer’s factory.

b. Factory Production Testing Reports: Submit copies of factory-certified production test reports.

3. Field Quality Control Submittals:

a. Report of results of field-testing.

4. Supplier Reports:

a. Submit written report of results of each visit to the Site by Supplier’s service technician, including purpose and time of visit, tasks performed, and results obtained. Submit within two days of completion of visit to the Site.

5. Qualifications Statements:

a. Manufacturer, when requested by Engineer.

C. Closeout Submittals: Submit the following:

1. Operations and Maintenance Data:

a. Submit in accordance with Section 01 78 23, Operations and Maintenance

Data.

b. Include acceptable test reports, maintenance data and schedules, description of operation, wiring diagrams, and list of spare parts recommended for one year of operation with current price list.

c. Include record drawings of control schematics, with point-to-point wiring diagrams.

D. Maintenance Material Submittals: Furnish the following:

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1. Spare Parts:

a. Furnish, tag, and box for shipment and long-term storage the following for each power center lineup:

Item Quantity per Power Center Lineup

a. Feeder breakers, size as shown on

Drawings

As shown on the Drawings

b. Breaker Trip Unit One per 10 (minimum 1) of each size and type used.

c. Spare power fuses One per of each size and type used

d. Control power fuse Five sets of each type and size used

e. Pilot light Two per 10 (minimum of 1) of each type used

f. Main Meter One.

b. Submit list of additional recommended spare parts for an operating period of one year. Describe each part, quantity recommended, and current unit price for each.

c. Deliver spare parts at the same time as switchgear.

1.05 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Packing:

1. Shipping sections shall be designed to be shipped by truck, rail, or ship.

2. Indoor sections shall be bolted to skids.

3. Package and separately ship breakers and accessories.

B. Handling:

1. Equipment shall be equipped to be handled by crane. Where cranes are not available, equipment shall be suitable for placement on rollers using jacks to raise and lower the groups.

2. Handle equipment in accordance with manufacturer’s instructions. Furnish one copy of such instructions with equipment at time of shipment.

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C. Storage:

1. Store equipment in a clean, dry location with controls for uniform temperature and humidity. Protect equipment with coverings and maintain environmental controls.

2. Protect equipment from corrosion and deterioration.

PART 2 - PRODUCTS

2.01 EQUIPMENT PERFORMANCE

A. Equipment Description: Secondary unit substations shall be a close-coupled assembly consisting of a primary switch, transformer, and secondary low-voltage distribution section that is electrically connected and physically joined.

2.02 MANUFACTURERS

A. Manufacturers: Provide products by one of the following:

1. Eaton.

2. Schneider Electric

3. Or equal.

2.03 PRIMARY SECTION

A. Switchgear: High-voltage switchgear section shall be grounded, metal-enclosed, 15 KV, dead-front, freestanding structure, containing air interrupter switch entrance module.

1. Two-position Air Interrupter Switch:

a. Rating: Three-pole, 13.8 KV nominal, 95 KV BIL, 600 ampere continuous, with fault closing rating of 40 K amperes asymmetrical and a momentary rating of

25 K amperes asymmetrical. Switch shall be capable of interrupting full rated load.

b. Operation: Air interrupter switch shall be manually operated, stored energy, gang-operated, quick-make/quick-break type, with separate main and arcing contacts and arc quenching chambers. Speed of switch opening and closing shall be independent of operator action.

c. Bus: Buses shall be copper with tin plating. Ground bus shall be 1/4-inch by two-inch, minimum. Bus and supports shall withstand stresses associated with short-circuit currents up through switchgear's maximum rating.

d. Provide interlocks to:

1) Prevent switch closing when switch compartment door is not fully closed and latched.

2) Prevent opening of the switch compartment door when the switch is closed.

3) Prevent operation of air interrupter switch with secondary load connected to the transformer.

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4) Prevent operation of transformer tap changer handle when the switch is closed.

e. Enclosure:

1) Maximum Enclosure Dimensions:

a) Primary Switch: 90”H x 36”W x 56”D

b) Transition Section: 90”H x 20”W x 56”D

2) Switch compartment shall have a sight window for visual inspection of switch contacts.

3) Lightning arrestors, distribution class, 12 KV. Connect arrestors on load side of switch.

4) Terminal compartment for cable entrance with two-hole copper compression connectors.

5) Each individual switch enclosure shall have an IR viewing window.

a) Window shall be positioned to allow thermographic scan of the interior of the equipment, especially the cable and bus connections, while equipment is energized.

b) Lens assembly recognized to UL 508A and UL 746C for flammability and impact resistance.

c) IEEE C37.20.2 compliant for metal clad and station switchgear.

d) IP65/NEMA 4 rated while open or closed.

e) 4” viewing diameter.

f) Safety cover to protect lens

6) Primary cable entry or exit shall be bottom entry/exit only.

7) Cable connection to transformer shall be through transition section.

f. Fuses:

1) Self-contained, expulsion type, sized as shown on the Drawings. Fuses shall have short-circuit rating of 80Kamperes, RMS symmetrical.

2) Fuse compartment shall include protective storage for three spare fuses.

Provide spare fuses, stored in fuse compartment.

2.04 TRANSFORMER SECTION

A. Oil-Filled Transformer: Transformer sections shall consist of oil-filled transformer complying with ANSI C57.12.00, equipped with the following:

1. Rating: KVA capacity as indicated on the Drawings, three-phase, 60 Hertz, 95 KV

BIL, 13.8 KV delta connected primary, 277/480-volt wye connected secondary as shown on the Drawings, with neutral brought out through a bushing.

2. Coolant: Coolant shall be non-toxic, fire-resistant, biological-based natural ester dielectric fluid. Coolant shall be 100-percent derived from edible seed oils and performance-enhancing additives shall be food grade. Coolant shall be FM-approved, UL-classified, Envirotemp FR3 fluid.

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3. Energy-efficient, complying with 10 CFR Part 431, Standard Efficiency Levels

4. Windings:

a. Primary and secondary windings shall be copper construction.

b. Winding temperature rise by resistance shall not exceed 55 degrees C.

c. Hottest spot winding temperature rise shall not exceed 65 degrees C.

d. Provide thermally-upgraded insulation allowing continuous loading of 112 percent of 55 degrees C KVA rating with winding temperature rise not exceeding 65 degrees C and hottest spot temperature rise not exceeding

80 degrees C.

5. Taps: Full capacity, two 2.5-percent primary taps above normal and two 2.5-percent primary taps below normal.

6. Impedance: Standard, but not less than 5.5 percent.

7. Enclosure:

a. Indoor, sealed, and rodent-proof.

b. Flange-equipped to mate to primary compartment section and secondary compartment section.

c. Sealed tank construction.

d. Lifting hooks.

e. Welded cover

f. Provisions for jacking the housing for both the high- and low voltage sides.

g. Bus transition sections suitable for connection of primary section and secondary low-voltage section.

h. Maximum Enclosure Dimensions:

1) Transformer Section: 90”H x 55”W x 60”D

2) Transition Section: 90”H x 22”W x 60”D

8. Accessories:

a. Load tap changer, externally operated with cover mounted operating handle.

Provide operating handle with key interlock, single lock type. Provide lock and key compatible with, and that function with, entire key interlock system specified.

b. Liquid level gauge with alarm contacts.

c. Drain valves with 3/8-inch diameter sampler.

d. Ground pad.

e. Diagrammatic nameplate.

f. Dial-type oil thermometer with alarm contacts.

g. Pressure-vacuum gage.

h. Cover mounted mechanical pressure relief device with automatic resealing resetting operation and mechanical signal for indication of device operation.

i. Provisions for mounting and wiring future low-velocity single-phase cooling fans.

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j. Instruction nameplate.

k. Lifting hooks.

l. Jacking pads.

m. Welded handhole.

n. Upper filter pressure cap.

o. Provisions for rolling and skidding.

p. Oil required to place transformer into service.

2.05 SECONDARY DISTRIBUTION SECTION

A. Low-Voltage Switchgear:

1. Switchgear shall consist of individually-mounted power air circuit breakers in draw-out type construction complying with ANSI/IEEE C37.20 Series. Switchgear shall have ratings as follows:

a. 600-volt, three-phase, 60 Hertz, three-wire.

b. Continuous AC main bus ampacity and bracing as indicated on the Drawings.

2. Bus System:

a. Power Bus: Three-phase tin-plated copper with current capacity and short circuit rating as indicated on the Drawings.

b. Main and vertical buses shall be phase- and ground-isolated and insulated from each other.

c. Each circuit shall consist of necessary bus connection between section bus and breaker line side stubs. Equip load studs with load extension busses terminating in solder-less type terminals in rear cable compartment.

d. Ground Bus: Tin-plated copper with current capacity equal to half capacity of main power bus and drilled with lugs of appropriate capacity as required.

3. Structure:

a. Each vertical steel unit shall be self-contained and self-supported structure having one or more individual breaker or instrument compartments, centralized bus compartment, and rear cabling compartment segregated from bus sections by means of solid insulating barriers. Equip rear compartments with hinged access doors each secured with minimum of three bolts and captured nuts.

b. Each individual breaker compartment shall be completely segregated from adjacent compartments by barriers at rear, top, bottom and sides, and equipped with draw-out rails, levering out mechanism, and primary and secondary contacts. Current transformers for instrumentation shall be located within the appropriate breaker compartment wired through shorting terminal blocks.

c. Outgoing section and feeder circuit breakers shall be arranged for termination of steel conduit and copper cable feeders. Number of conduits and cables

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26 11 16-9 associated with each feeder shall be as shown or indicated on the Drawings.

d. Enclosure:

1) Maximum Enclosure Dimensions:

a) Low-voltage Switchgear Section (each): 90”H x 22”W x 60”D (5 sections)

4. Circuit Breakers:

a. Main, tie, and feeders shall be 600-volt AC, 60 Hertz, three-pole, draw-out type power circuit breakers, 100-percent equipment-rated. Breakers shall include electronic microprocessor-based trip system. Breaker frame size, sensor rating, and short-circuit rating shall be as shown or indicated on the Drawings.

Breakers shall comply with ANSI/IEEE C37.13, IEEE C37.16, and UL 1066.

b. Operation:

1) Manually-operated stored energy mechanism.

2) Provide electrical operator, where shown on Drawings, suitable for 120-volt open-close operation. Electric operators shall include continuously rated close and trip coils and shall be equipped with a mechanical interlock that prevents breaker closure when the trip coil is energized.

c. Equip breaker removable elements with disconnecting contacts, wheels, and interlocks for draw-out operation. Draw-out design shall allow closure of compartment door with breaker in the “connected”, “test”, and

“disconnected” positions. Provide mechanical interlock to prevent breaker racking while in closed position. Withdrawn position shall allow 180-degree unit rotation and provisions for padlocking provided for all positions.

d. Electronic trip system shall include plug-in protection programmer, flux shift trip device, and current sensor package. Programmer, sensor, and flux-shifting trip device shall be constructed as integral elements of the breaker, requiring no externally mounted assemblies for proper operation.

e. Solid-state, microprocessor-based, nine-function programmer shall provide true RMS current sensing and include adjustable continuous and instantaneous current elements with adjustable long time, short time, zero sequence ground fault pickup, and delay and zone selective interlocking. Main, tie, and feeder circuit breakers shall be connected for zone selective interlocking to allow instantaneous bus protection.

f. Accessories:

1) Maintenance closing handle.

2) Indicating lights for circuit breaker status - red for “CLOSE”, green for

“OPEN” and amber for “OVER-CURRENT TRIP”.

3) Shunt trip.

4) Auxiliary contacts for remote indication of circuit breaker status: Position

(racked in, out), open, close, and over-current trip.

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5) Targets for overload, short circuit, and ground trip indication.

6) Test kit for testing of breaker trip unit.

7) Test cabinet for testing electrically operated breakers outside housing.

8) Provide key interlock systems as required for the interlocking schemes shown or indicated on the Drawings. Each system shall be complete with necessary keys and locks for the schemes indicated.

g. Arc-Flash Reduction Maintenance System:

1) Provide arc-flash reduction maintenance system on breakers as indicated on the Drawings and as specified below:

a) The Arc Flash Reduction Maintenance System shall reduce the instantaneous pickup value when activated. The device must not compromise phase protection or defeat its functionality, even when enabled. Once disabled, the recalibration of phase protection must not be required.

b) Activation and deactivation of reduced maintenance trip setting must be accomplished without opening the circuit breaker door and exposing operator to energized parts.

c) The Arc Flash reduction system shall provide a switchgear mounted indicating light for visual indication that the Arc Flash reduction system is activated.

d) The Arc Flash reduction system switch shall provide a lockable cover to avoid tampering. The switch must be rated and tested for millivolt signals in harsh environments. The switch shall include an extra

NO/NC contact for remote indication.

e) The switch shall be physically located on the Remote Control Panel.

f) The reduced maintenance trip setting must be adjustable with a minimum of five settings ranging from 2.5X to 10X of sensor tap value.

g) The Arc Flash Reduction System maximum clearing time must not exceed 0.05 seconds. The system must meet the requirements of ANSI

C37.59 and EMI testing.

B. Automatic Transfer Control System (Auto Throw-over, ATO):

1. Automatic Transfer Control System:

a. Provide a transfer system capable of functions described in this section. The transfer control system scheme shall be accomplished with solid-state relays and manual switch devices only. Programmable Logic Controller (PLC) shall be used for monitoring status of unit substation operation and communicating with SCADA systems.

1) The automatic transfer control system shall be physically located in the secondary unit substation.

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2) The automatic transfer system will also include a keyed 69 switch for selecting manual or automatic operation of the transfer system.

b. Negative sequence/under-voltage relay:

1) ANSI function 47N/27

2) Adjustable time .1 - 9.9 seconds in one second increments.

3) Two relays: 47N-NO and 27-NO.

4) Auxiliary contacts 47N-NC and 27-NC.

5) Manufacturer: Basler Electric.

c. Lock-Out Relays: ANSI function 86.

d. Sync check Relay: ANSI function 25.

e. Operator Interface Terminal:

1) LCD color screen.

2) Provide Display Enable Control.

2. Current and Voltage Relay Functions:

a. Branch/Feeders Breakers:

1) Time Overcurrent (51): Adjustable, long time, short time, and time delay.

2) Instantaneous Overcurrent (50): May be turned off if necessary for coordination.

3) Ground fault, adjustable with I2t

b. Tie Breaker:

1) Time Overcurrent (51): Adjustable long time, short time and time delay.

2) Sync Check (25).

c. Main Breakers:

1) Time Overcurrent (51): Adjustable long time, short time and time delay.

2) Under Voltage (27).

3) Sync Check (25).

4) Ground Fault, adjustable with I2t.

5) Phase sequence (47).

3. Transfer Sequence:

a. Provide ON-OFF switch for transfer control:

1) OFF: transfer is disabled.

2) ON: transfer is enabled.

b. Loss of power on one source:

1) If an under voltage/phase imbalance is detected by 47N/27 relay then the affected main breaker will open after a two minute delay.

2) After main breaker is open the tiebreaker will close after an adjustable dead bus time delay (minimum 2 seconds).

3) When failed source returns, retransfer will not happen until an operator initiates the retransfer process by pressing a button on the gear. Provide an adjustable 15 second delay before retransfer function to begin. A sync

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26 11 16-12 check relay (25) will prevent retransfer until both feeders (A & B) are within acceptable synchronism. Retransfer shall close the associated main breaker and the tiebreaker will open (closed transition). Allow maximum 2 seconds parallel operation of main breakers. If synchronism is not achieved, as decided by the operator, provide a retransfer abort and manual method of opening the tie breaker and closing the main in open transition mode.

c. Loss of power on second source after loss of power on one source and transfer:

Maintain present state of breakers.

1) Loss of power both sources: Maintain present state of breakers.

d. Maintenance transfer:

1) Provide for the operator to manually open main breaker to de-energize bus for maintenance. Tie breaker to remain open.

2) Operator will manually close main breaker.

e. Pilot devices shall be used for the following:

1) Light (blue), “86-1 Lockout Coil Healthy”

2) Light (blue), “86-2 Lockout Coil Healthy”

3) Light (white), “Source 1 Available”

4) Light (white), “Source 2 Available”

5) Light (green), “Source 1 Open”

6) Light (green), “Source 2 Open”

7) Light (green), “Tie open”

8) Light (red), “Source 1 Closed”

9) Light (red), “Source 2 Closed”

10) Light (red), “Tie Closed”

11) Selector switch “Source 1” Open/Close

12) Selector switch “Source 2” Open/Close

13) Selector switch “Tie” Open/Close

14) Selector switch “Trip Selector Switch Device 10” Source 1/Tie/Source 2

4. Network Switch:

Provide managed network fanout switch for network communications/connections from energy metering devices and for switchgear status monitoring from PLC controller in Remote Breaker Control Panel.

a. General:

1) The Network Switch shall be a ruggedized single switching unit suitable for industrial applications hardened for vibration, shock, surge & electrical noise. Industrial Switch shall feature no fans or moving parts. Each

Network Switch unit shall include the required ports to accommodate the ethernet and fiber-optic port count requirements as shown and specified.

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2) The Network switch shall be a managed type and provided with a full set of management features, including Command Line Interface, SNMPv3 agent, and manufacturer Device Manager. Network switch shall have features to manipulate configurations, such as the ability to display, modify, backup and restore configurations.

3) Provide all necessary items for installation, including mounting brackets, interconnecting cables, hardware, and appurtenances.

b. Features:

1) Type: Managed Network Switch, Layer 3.

2) Connectivity:

a) Ethernet Ports: Four (4) ports minimum. Ethernet ports shall be type

RJ-45 supporting 100Base-TX transmission over Category 6 cable.

b) Fiber Optic Ports: Two (2) ports minimum. Fiber Optic Ports shall support 100Base-FX transmission over multimode full-duplex fiber cable.

3) SFP Modules:

a) Provide quantity and type of SFP modules to achieve the functionality as shown and specified.

b) Fiber Optic Ports: Supports 100Base-FX transmission over multimode full duplex cable.

c) Ethernet Ports: RJ-45 type supporting 100Base-TX transmission over

Category 6 cable.

4) Mounting: DIN Rail Mount type. Provide standard EIA 19” adapter for mounting in a standard rack configuration.

5) Alarms: One (1) alarm contact relay output for fault indication minimum.

6) Status and diagnosis indicators:

a) The switch shall have LED indication for: Power status, collision, over temperature.

b) The switch shall have LED indication per port for Packet reception, partition, link status.

7) The switch shall comply with the following:

a) IEEE 802.3u. 100Base-TX compliant.

b) 100 Mbps baseband CSMA/CD (Carrier Sense Multiple Access /

Collision Detection) standards.

c) ISO 8802/3.

8) Management features shall include:

a) bility to turn a particular port range on or off.

b) Link speed and duplex settings.

c) Prioritize settings for ports.

d) MAC filtering and "port security" features to prevent MAC flooding.

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e) Spanning Tree Protocol.

f) SNMPv3 monitoring of device and link health.

g) Port mirroring.

h) Link aggregation.

i) VLAN settings.

j) 802.1X network access control.

k) IGMP snooping and query.

9) Redundancy Protocols supports:

a) Resilient Ethernet Protocol (REP)

b) Parallel Redundancy Protocol (PRP)

c) Media Redundancy Protocol (MRP) Ring

d) High Availability Seamless Redundancy (HSR)

10) Temperature Rating: -40 to 75C

11) Product and Manufacturer:

a) IE-2000 as manufactured by Cisco (Emerson Part No. XXXX)

b) Stratix 5200 as manufactured Rockwell Automation

2.06 PROGRAMMABLE LOGIC CONTROLLER (PLC) AND HUMAN-MACHINE INTERFACE (HMI)

A. The PLC configuration indicated is diagrammatic. The PLC system shall include as a minimum power supply, network connections, I/O cards, CPU and a HMI as required to achieve the specified functionality.

B. The final system configuration shall utilize the System Manufacturer’s standard hardware and software to meet the functional requirements of these Specifications.

C. The PLC system shall be capable of being integrated into a larger plant wide PLC system, or DCS system using non-proprietary network communication protocol.

D. Communication capability shall include Ethernet TCP/IP, serial communications using

RS-485, and Modbus RTU Protocol.

E. The PLC system should have as a minimum the following features and capabilities:

1. The CPU shall be a 32-bit microprocessor with onboard dynamic random-access memory (DRAM) and flash memory for read/write functions and storage of configured data without battery backup. The microprocessor shall operate:

a. With a minimum clock speed of 25 MHZ.

b. With a minimum of 10K user application storage space.

c. Diagnostic LED’s or indicating lights that, at a minimum, identifies processor status as (e.g., running, faulted or forced), communication status, and power on.

d. Internal Clock.

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e. Include Arithmetic and PID function blocks.

f. Ladder logic programming features.

g. Online and offline programming capabilities.

h. Accept DC and AC analog, RTD, and digital input and output signals.

i. Provide timer, counter, shift register, and move control functionality.

j. Programming of PLC will be done using a personal computer attached to the front of the PLC or through a network node.

2. The HMI shall provide operator access to the PLC system for monitoring and control purposes. The HMI shall include the following hardware features as a minimum:

a. 32-bit microprocessor.

b. 2.2 GHZ clock speed (min.)

c. 512 Kb cache.

d. 256 MB M.2 SSD (min.)

e. Color frame buffer, memory management.

f. Advanced graphics controller.

g. Video output, serial interfaces.

h. Control network interface connections.

i. Boot and diagnostic support.

j. Internal clock.

k. The processor shall perform computation intensive functions and process file requests from tasks itself or from other stations.

l. Workstation shall be provided with an Ethernet communications port to support TCP/IP networking standards.

m. Operating System to be Windows 10 or latest version of Windows operating system.

n. Each HMI shall include a high-resolution flat panel LCD touch screen designed for continuous operation and use.

3. I/O Modules:

a. All I/O modules shall meet Surge Withstand Capability Standard ANSI/IEEE

C37.90.1-1989. All I/O modules shall be Radio Frequency Protected, providing

140 dB common mode and 80 dB, 60 Hz normal mode noise rejection, and conform to SAMA-PMC 33.1. Analog cards shall have individual A/D and D/A converters on a per point basis with all inputs and outputs being optically or galvanic ally isolated. Input/Output module performance specifications are specified below:

b. Current Inputs (4 to 20 mADC):

1) Input Range: 0 to 20.4 mADC.

2) Rated Mean Accuracy: +0.05 percent of span.

3) Isolation: 600 VAC.

4) Transmitter Power: 24 volts at 20 mA.

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5) Resistance: 390 ohm, maximum.

6) Conversion Time: 0.1, 0.2, 0.5, 1.0 seconds (software configurable).

7) Linearity Error: Between 0.0125 and 0.005 percent of range time conversion dependent.

8) Resolution: 12, 13, 14, and 15 bits, time conversion dependent.

9) Field Termination: No. 12 AWG, maximum.

c. Current Outputs:

1) Output Range: 0 to 20.4 mADC.

2) Output Load: 735 ohms.

3) Compliance Voltage: 18.6 volts nominal at 20 mA at field terminals.

4) Rate Mean Accuracy: +0.05 percent span.

5) Linearity Error: +0.025 percent of span.

6) Resolution: 12 bits.

7) Isolation: 600 VAC.

8) Field Termination: No. 12 AWG, maximum.

9) Bypass Jack: Built into the termination connector.

10) Accepts external 20 mA source.

d. Contact Input (Voltage Monitor 120 Vac). All contact input cards shall contain filtering to eliminate contact bounce. The filters shall reject input signal levels, which are not stable over a configurable time period.

1) Input ON-state Voltage: 79 to 132 VAC.

2) Input OFF-state Voltage: 0 to 20 VAC.

3) Input Current: 2.2 mA at 20 to 132 VAC.

4) Isolation: 600 VAC.

5) Filter Time: Configurable (4, 6, 16 or 32 Ms).

6) Source Resistance Limits:

a) ON-state: 1K ohm (max) at 79 VAC.

b) OFF-state: 100K ohm (min) at 132 VAC.

7) Field Termination: No. 12 AWG, minimum.

e. Contact Output (Switch):

1) Voltage: 79 to 132 VAC, field furnished.

2) Current: Two amps, maximum.

3) Off-State Leakage: Five mA, maximum.

4) Isolation: 600 VAC.

5) Field Termination: No. 12 AWG, maximum.

f. Pulse Input:

1) Input: Four isolated and independent channels.

2) Input Range Configurable:

a) 1250 Hz.

b) 2500 Hz.

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c) 6250 Hz.

d) 12500 Hz.

3) Isolation: 600 VAC.

4) Resolution: 12 bits.

5) Field Termination: No. 12 AWG, maximum.

g. Contact DC Input/Output:

1) Input ON-state Voltage: 15 to 130 VDC.

2) Input OFF-state Voltage: 0 to 5 VDC.

3) Input Short-Circuit Current: 2.5 mA, maximum.

4) Input Isolation to Earth: 600 VAC.

5) Output Switch (with internal source).

6) Output Voltage (no load): 11 VDC + 2 VDC.

7) Source Resistance: 660 ohm, nominal.

8) Off-state Leakage Current: 0.5 mA, maximum.

9) Filter Time: Configurable (4, 8, 16, or 32 Ms).

10) Resistance Limits:

a) ON-state: 1 K ohm, maximum.

b) OFF-state: 100 K ohm, minimum.

11) Field Termination: No. 12 AWG, maximum.

F. Manufacturers: Provide products by one of the following:

1. Rockwell Automation

2. Schneider Electric

3. Or equal.

2.07 MAIN METERING DEVICE

A. Provide a main meter device as shown on the Drawings and the Contract Documents.

1. Microprocessor-based monitoring device shall provide complete electrical metering in one package. Device shall include self-contained potential transformers and self-protected internal fuses.

2. Main metering device shall be compatible with Schneider Electric PME monitoring system and provide Ethernet TCP/IP communications link to GLWA’s existing PME-

9 remote enterprise server.

3. Mount device on the compartment door to allow personnel access to meter menu and display.

4. Device shall include trend analysis, event logging, and recording, and include the following direct-reading metered values:

a. Volts: 0.2 percent accuracy.

b. Amperes: 0.2 percent accuracy

c. Watts, Vars and VA: 0.5 percent accuracy

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d. Power Factor: 1.0 percent accuracy

e. Frequency: 0.05 percent accuracy

f. Watt and VA Hours: 0.5 percent accuracy

g. Var. Hours: 1.0 percent accuracy

h. Watt, Var, and VA Demand: 0.4 percent accuracy

i. THD-Voltage: 50th harmonic

j. THD-Current: 50th harmonic

k. Individual Ampere Harmonics: 50th harmonic

l. Individual Voltage Harmonics: 50th harmonic

5. Provide metering device with the following additional features:

a. Trend analysis displaying minimum and maximum values for each metered parameter with date and time of each occurrence.

b. Input range of device shall accommodate external current transformers with ranges from 100/5 to 5000/5 and potential transformers from a ratio of

120:120 to 500,000:120.

c. Alarm contacts rated five amps at 120 vac.

d. Three analog outputs programmable to reflect the metered parameters, except kilowatt hours and kilovar hours.

e. Communication capability shall include Ethernet TCP/IP, serial communications using RS-485, and Modbus RTU Protocol.

6. Control power shall be drawn from monitored incoming AC line. Device shall have non-volatile memory and not require battery backup. During power failure, device shall retain preset parameters.

7. Metering devices shall be Schneider Series 9000 (for main breakers) and series 8000 for feeder circuits.

2.08 SURGE PROTECTIVE DEVICES

A. Provide surge protective device in accordance with Section 26 43 00, Surge Protective

Devices for each secondary distribution bus as shown or indicated on the Drawings.

Surge protective device shall be included and factory-mounted within secondary distribution equipment by secondary distribution equipment manufacturer. Surge protective device monitoring and display shall be visible from front of secondary distribution equipment.

2.09 WIRING AND DEVICE IDENTIFICATION

A. Provide control wiring and internal device identification for each compartment, including:

1. Identify control conductors with permanent wire markers. Each wire shall be identified by a unique number and shall be attached to the wire at each termination point.

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2. Identify each control device with permanent markers. Each device shall be identified by a unique number and shall be attached to each device.

3. Identify numbering system for each wire and control device on wiring diagrams and shall be the actual designations used in the Work.

2.10 FINISHING

A. Shop Painting:

1. Surface Preparation: Thoroughly clean substation’s metal surfaces, provide surface preparation in accordance with paint manufacturer’s recommendations.

2. Primer: Provide one coat of standard primer.

3. Finish Coat:

a. Surfaces located indoors, including surfaces inside enclosure, shall receive one shop coats of standard finish.

b. Provide exterior surfaces located outdoors two shop coats of standard finish.

c. Color of finishing coats shall be ANSI No. 61, “light gray”.

2.11 SOURCE QUALITY CONTROL

A. Tests:

1. Perform factory tests on equipment prior to shipment. Testing shall consist of the manufacturer's standard tests, and at minimum shall include the following:

a. Physical inspection, checking of all components, and wiring checks.

b. Breaker operation, device functional tests, and sequencing of control circuits.

c. Primary, control, and secondary wiring dielectric tests.

d. Transformer testing as specified under this Section.

2. Transformer Testing: Perform the following tests on all transformers except as specified below. Numbers shown do not necessarily indicate the sequence in which tests will be made. Tests shall be in accordance with ANSI Standard Test Code for

Transformer, C57.12.90 and C57.12.91.

a. Resistance measurements of all windings on the rated voltage connection of each unit and at tap extremes.

b. Ratio tests on rated voltage connection and on all tap connections.

c. Polarity and phase-relation tests on rated voltage connection.

d. No-load loss at rated voltage on rated voltage connection.

e. Exciting current at rated voltage on rated voltage connection.

f. Impedance and load loss at rated current on rated voltage connection of each unit and on tap extremes.

g. Temperature Test:

1) Temperature test shall be made when there is no available record of a temperature test made in accordance with ANSI standards on a duplicate or essentially duplicate unit.

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2) Subject to limitations of the preceding paragraph, when transformer is furnished with auxiliary cooling equipment to provided more than one kVA rating, perform temperature tests for all nameplate kVA ratings.

h. Applied potential tests.

i. Inducted potential tests.

PART 3 - EXECUTION

3.01 INSPECTION

A. Examine conditions under which materials and equipment will be installed and notify

Engineer in writing of conditions detrimental to proper and timely completion of the

Work. Do not proceed with the Work until unsatisfactory conditions are corrected.

B. Contractor shall field investigate existing conditions to ensure supplied equipment and accessories are compatible with associated existing equipment, systems and infrastructure.

3.02 INSTALLATION

A. Install equipment in accordance with manufacturer's recommendations and instructions, Laws and Regulations, and the Contract Documents. Install equipment as shown on concrete bases, and on support channels in concrete in accordance with equipment manufacturer’s recommendations.

B. Install terminations, lugs, and required appurtenances to properly terminate power supplies.

C. Install control wiring terminations and appurtenances necessary to complete the installation of control and monitoring devices.

D. Connections to existing facilities shall be in accordance with Section 01 14 16, Coordination with Owner’s Operations.

3.03 FIELD QUALITY CONTROL

A. Site Tests:

1. Site Testing, General:

a. Provide field-testing and inspection of substation equipment. After installation, inspect, adjust, and test each substation.

b. Testing and inspection shall be in accordance with the manufacturer’s recommendations, Laws and Regulations, and the Contract Documents, and shall be performed by the manufacturer’s factory-trained representative.

c. Through Contractor, manufacturer’s representative shall inform Owner and

Engineer when equipment is correctly installed.

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d. Do not energize equipment without Owner's permission.

2. Perform the following tests and checks before energizing equipment:

a. Verify proper installation of equipment and ratings.

b. Inspect all mechanical and electrical interlocks and equipment for proper operation.

c. Check tightness of bolted connections.

d. Measure insulation resistance of each bus section phase-to-phase and phase-to-ground.

e. Measure insulation resistance of each switch, circuit breaker, and fuse pole to pole and from pole to ground.

f. Perform other tests and adjustments recommended by equipment manufacturer.

g. Perform the following tests for each transformer:

1) Insulation resistance.

2) High potential.

3) Turns ratio tests at all tap positions.

3. Provide testing equipment and services for testing the equipment specified.

B. Manufacturer Services:

1. Unloading and Installation: Manufacturer’s factory-trained representative shall be present during unloading of the equipment and installation in the equipment’s final location. Representative shall train installing personnel in advance in the proper handling and rigging of the equipment.

2. Post-installation Check: Manufacturer’s factory-trained representative shall check and approve the installation before initial operation.

3. Testing and Start-up: Testing, checkout and start-up of the equipment shall be performed under the technical direction of the manufacturer’s factory-trained representative. Representative shall operate and test the system in the presence of Engineer and verify that equipment complies with the Contract Documents. Do not energize system without authorization from manufacturer’s representative.

4. Technician shall revisit the Site as often as necessary until installation is acceptable.

5. Provide services of manufacturer’s factory-trained representatives to correct defective Work within 72 hours of notification by Owner during the correction period.

6. All costs, including expenses for travel, lodging, meals and incidentals, and cost of travel time, for visits to the Site shall be included in the Contract Price.

7. ADJUSTING

a. Calibrate, set, and program protective devices. Coordinate protective devices furnished under this Section and provide proper settings of all devices in accordance with the findings of study specified under Section 26 05 73, GREAT LAKES WATER AUTHORITY SECONDARY UNIT SUBSTATIONS

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Electrical Power Distribution System Studies.

END OF SECTION